--- title: "CVE-2019-10149: exim vulnerability | CubePath" description: "A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver_message() function in /src/deliver.c…" language: en source: https://cubepath.com/security/cve/CVE-2019-10149 --- # CVE-2019-10149: exim vulnerability | CubePath ## Description A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver\_message() function in /src/deliver.c may lead to remote command execution. Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-10149) ## Key data ### CVSS 3.0 Critical 9.0 Score published by redhat in the CVE record. CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | ------- | ----------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | High | The attack depends on conditions outside the attacker's control, so it takes preparation. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.99961 (99.96% probability) Percentile 99.97% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Exim Mail Transfer Agent (MTA) Improper Input Validation Added to the catalog Jan 10, 2022 Federal due date Jul 10, 2022 ### CISA assessment as of Feb 7, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-78](https://cwe.mitre.org/data/definitions/78.html) Improper Neutralization of Special Elements used in an OS Command ## Affected products Products listed in the CVE record, as the CNA published them. - exim - affected: 4.92 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [\[oss-security\] 20190605 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit](http://www.openwall.com/lists/oss-security/2019/06/05/2) (openwall.com) mailing-list - [USN-4010-1](https://usn.ubuntu.com/4010-1/) (usn.ubuntu.com) vendor-advisory - [\[oss-security\] 20190605 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit](http://www.openwall.com/lists/oss-security/2019/06/05/3) (openwall.com) mailing-list - [\[oss-security\] 20190605 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit](http://www.openwall.com/lists/oss-security/2019/06/05/4) (openwall.com) mailing-list - [DSA-4456](https://www.debian.org/security/2019/dsa-4456) (debian.org) vendor-advisory - [20190605 \[SECURITY\] \[DSA 4456-1\] exim4 security update](https://seclists.org/bugtraq/2019/Jun/5) (seclists.org) mailing-list - [GLSA-201906-01](https://security.gentoo.org/glsa/201906-01) (security.gentoo.org) vendor-advisory - [\[oss-security\] 20190606 Re: CVE-2019-10149: Exim 4.87 to 4.91: possible remote exploit](http://www.openwall.com/lists/oss-security/2019/06/06/1) (openwall.com) mailing-list - [108679](http://www.securityfocus.com/bid/108679) (securityfocus.com) vdb-entry - [openSUSE-SU-2019:1524](http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00020.html) (lists.opensuse.org) vendor-advisory - [20190611 The Return of the WIZard: RCE in Exim (CVE-2019-10149)](http://seclists.org/fulldisclosure/2019/Jun/16) (seclists.org) mailing-list - [\[oss-security\] 20190725 Re: Statistics for distros lists updated for 2019Q2](http://www.openwall.com/lists/oss-security/2019/07/25/6) (openwall.com) mailing-list - [\[oss-security\] 20190725 Re: Statistics for distros lists updated for 2019Q2](http://www.openwall.com/lists/oss-security/2019/07/25/7) (openwall.com) mailing-list - [\[oss-security\] 20190726 Re: Statistics for distros lists updated for 2019Q2](http://www.openwall.com/lists/oss-security/2019/07/26/4) (openwall.com) mailing-list - [\[oss-security\] 20210504 21Nails: Multiple vulnerabilities in Exim](http://www.openwall.com/lists/oss-security/2021/05/04/7) (openwall.com) mailing-list - [bugzilla.redhat.com/show\_bug.cgi?id=CVE-2019-10149](https://bugzilla.redhat.com/show%5Fbug.cgi?id=CVE-2019-10149) - [exim.org/static/doc/security/CVE-2019-10149.txt](https://www.exim.org/static/doc/security/CVE-2019-10149.txt) - [packetstormsecurity.com/files/153218/Exim-4.9.1-Remote-Comm…](http://packetstormsecurity.com/files/153218/Exim-4.9.1-Remote-Command-Execution.html) - [packetstormsecurity.com/files/153312/Exim-4.91-Local-Privil…](http://packetstormsecurity.com/files/153312/Exim-4.91-Local-Privilege-Escalation.html) - [packetstormsecurity.com/files/154198/Exim-4.91-Local-Privil…](http://packetstormsecurity.com/files/154198/Exim-4.91-Local-Privilege-Escalation.html) ## Timeline 1. ID reserved Mar 27, 2019 2. Record published Jun 5, 2019 3. Added to CISA KEV Jan 10, 2022 4. Record last updated Oct 21, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:33 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)